Fabrik krauss



2 Sheets-Sheet 1.

(No Model.)

R; HELMHOLTZ.

LOGDMOTIVE Patented Mar. 13, 1894.

(I NATIOVNAL LWAPNING COMPANY- (No Model.) 2 SheetsSheet 2. R. HELMHOLTZ.

LOGOMOTIVE No. 516,436. Patented Mar. 13, 1894.

RICHARD HELMHOLTZ, or KoNIesBERe, ASSIGNOR TO THE LOCOMOTIV- FABRIK KRAUSS & COMPANY AKTIEN-GESELLSOHAFT, OF MUNICH,

' GERMANY.

LOCOMOTIVE- SPECIFICATION forming part of Letters Batent No. 516,436, dated March 13, 18 94. Application filed November 2, 1893. Serial No. 489,879- (No model.)

Zo all whom it may concern.-

Be it known that I, RICHARD HELMHOLTZ, a subject of the Emperor of Germany, residing at Konigsberg', East Prussia, Prussia, Germany, have invented certain Improvements in Locomotives, of which the following is a specification.

In locomotives of ordinary construction having two pairs of drivers driven from one pair of cylinders, the dimensions of such cylinders must be such as to produce the maximum hauling power, which corresponds, as is well known to the total weight resting upon the drivers. This construction has the objection that when a certain velocity is attained, the coupling of the drivers becomes superfluous, for the reason that the adhesion of one pair of drivers would be sufficient for the haulingpower determined by the surface of evaporation of the boiler. Otherwise, smaller cylinders would, at these velocities, give better results than the dimensions calculated for the maximum hauling power. These two items, first, the heavier running of the drivers consequent on their being coupled, and second, the excessive dimensions of the steam cylinders, exert unfavorable influences on the working of the engine, and for this reason the best results at high velocity as well as the highest absolute velocities have been attained heretofore by uncoupled drivers or locomotives having but one pair of drivers. The use of such engines is, however, usually inconvenient by reason of the low hauling powerof such engines.

The object of the present invention is to unite the advantages of the locomotive having uncoupled drivers whereby great velocity may be attained, with those of the locomotive having coupled drivers whereby great hauling power is imparted, and I will now proceed to describe the same with reference to the accompanying drawings, of which- Figure 1 is a side elevation of a locomotive provided with my improvements and Fig. 2 is a transverse section of the same taken in two planes. Fig. 3 is a horizontal section of one half of the engine as seen in Fig. 1. Figs. 4, 5, and 6 are diagraphic views which will be hereinafter referred to.

' actuated or elastic supports it.

admission of steam In the drawings B represents the main drivers driven from the main cylinders a as seen in Fig. 3, and D represents the auxiliary drivers driven from the auxiliary cylinders c.

The main engine, with its inner cylinders a and the driven axle b is provided with very large drivers, to be operated at all velocities, while the auxiliary engine comprising the external cylinders c and driving axle d is provided with drive and is intended to increase the hauling capacity of the locomotive. For this purpose I have provided means whereby the auxiliary engine may be stopped when the speed reaches the limit and have also wherebythe forward drive wheels D and their axle 01 may in such cases be raised clear of the track in order to reduce the load on the main cylinders. The axle d is placed between two axlese, e bearing truck Wheels properly united therewith by means of a swinging or pivoted frame of well known construction (seen in Fig. 3) pivoted on a pin f to the main frame g of the engine, and sliding vertically in the ordinary manner between 75 blocks h.

The bearings 1', (Fig.2) of shaft or axle d are firmly connected with the spring These spring supports it are in the nature of piston rods and bear pistons n arranged in the cylinders 80 Z through which they pass through Stuffing boxes in the ends thereof and are connected to the leaf springs m (Figs. 1 and 2) such springs being supported from the frame in any convenient manner are tensioned wardlyin order to keep the drive wheels D normally lifted free from the track for a distance marked 0 in Fig. 2 ofthe drawings. By means of a three way cock p (Fig. 1) and the pipes q steam is admitted pistons in cylinders Z or said space is placed in communication with the atmosphere. The thereinto has, as will be obvious, the effect of depressing the drivers D into contact with the rails. The admission of steam to the cylinders is efiected through the inlet crosspipe r. The pipe 8 (Fig. 2) is branched off from the same and connects with the slide valve box, common to both main cylinders a and a check valve 25, also connected 100 wheels of small diameter,

provided means E and is to the space above the to said inlet pipe r serves to open and close be considerably enlarged between the wheels. the passage to the pipes v leading to the sup- Thus an increased grate surface may be emplementary cylinders c. The valve is operployed by limiting the length of grate and the ated by means of a draw bar a led back to cylindrical portion of the boiler can be pro- 5 the stand of the engineer. The exhaust steam vided with more fines giving increased heatof the supplementary cylinders is led through ing surface. It is evident that the supplepipe 10 and through an ejector or blast tube mentary axle d may also be employed in locom arranged concentrically around the blast motives having two coupled drivers as well tube of the main engine in the stack. The as on locomotives having single drivers, and I0 rod y of the valve gear of the supplementary for this reason I do not desire to be underengine is connected by rod and lever z with stood as limiting myself to the exact construethe operating bar of the main engine so that tion and arrangement of myimprovements as both may be manipulated simultaneously. herein set forth.

In order to operate the supplementary en- Having thus described my invention, I

r 5 gin e, the piston 01. of cylinders Z is first pressed claimdown by opening the cock ps0 that the wheels 1. In a locomotive, the combination with a D are pressed against the rails (whereby the main engine having two cylinders and drive two axles care relieved of one half the weight wheels, of the supplementary drivers, means on axle d) and then valve t is opened to adfor raising and lowering said supplementary 2o mit steam to the cylinders c. To stop the drivers and means substantially as described supplementary engine valve 25 is closed and for actuating saidsupplementary drivers, substeam allowed to escapefrom cylinders '1 into stantially as set forth.

the atmosphere whereby the wheels D are 2..Inalocomotive,thecombinationwiththe 7o lifted clear of the rails by springs m. Both main engine having two cylinders and drive 2 5 operations may be afiected while the train is wheels, of the supplementary drivers vertiin motion. As far as the operation of the cally movable in the frame, spring supports locomotive is affected, it does not matter for said supplementary drivers, cylinders arwhether both engines or only the main enranged adjacent to said spring supports and gine are in use, since they may be handled pistons arranged in said cylinders and con- 0 by the engineer simultaneously. nected to said supports substantially as set In locomotives provided with air brakes it forth. is evident that cylinder Z may be replaced by 3. In alocomotive, the combination with the an air cylinder and the wheels D depressed main engine having two cylinders and drive by compressed air instead of steam. wheels, of the supplementary engine also com- 3 5 The device as illustrated and described prising two cylinders and drivers, trucks arpossesses, over and above the advantages ranged on opposite sides of said supplemenabove enumerated, the following:first, bettary drivers and means for elevating and deter production of steam and higher efficiency pressing said supplementary drivers snbstanwhen the train is climbing steep grades for tially as set forth.

o thereason that there is a greater number of In witness whereof I have hereunto signed revolutions of the supplementary axles and my name in presence of two subscribing witgreaiter exhaust into the chimney; second, nesses. faci itation of the general arrangement of the l a A v locomotive by reason of there being only one RHHARD HELMHOL'IA 45 pair of large drivers; third, a better position Witnesses:

is afforded the engineer for whom the plat EMIL HENZEL, form and fire box q (see Figs. 4 and 5) may GY. MANDL. 

